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Byju's Answer
Standard XII
Mathematics
Monotonicity in an Interval
If x=asecθ+bt...
Question
If x = asecθ + btanθ and y = atanθ + bsecθ, then, x
2
– y
2
= a
2
– b
2
A
a
2
- b
2
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B
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C
a
2
.b
2
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D
a
2
+ b
2
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Solution
The correct option is
A
a
2
- b
2